Each political party represented in the Federal Parliament elects leaders in each house.
Just as the government is decided in the House of Representatives, so the parties elect their leaders and deputy leaders from amongst their representatives in the House. If the party is not represented in the lower house, its leader will be chosen from amongst its members in the Senate.
These tables are correct as of the first day of the 2017 sittings of the 45th Parliament. Following the retirement of Senator Stephen Conroy on September 30, 2016, the ALP elected Senator Don Farrell as its deputy leader in the Senate.